Nanosecond pulse generator (CB9076E)

This circuit was found in ancient American documentation. Diodes are general-purpose types.

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Low distortion oscillator (CB9200E)
This Wien bridge oscillator was found in a 90's EDN. The components are from that time and the...
Liquid Level Control (CB5311E)
The purpose of this circuit is to maintain the liquid level of a reservoir between two values...
Comparator with different voltages (CB5976E)
In the figure we have the way to use a voltage comparator powered by a voltage to control a...